多年冻土区高速公路路基新结构工程示范研究
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摘要
为研究适用于多年冻土区高速公路的路基调控结构,对片块石-通风板复合路基、强制弥散式通风路基、通风管路基、单向导热路面-片块石路基4种新型结构,依托共玉高速公路进行了宽12.25 m的分幅示范研究。依托花大高速公路,对填土路基进行了宽24.5 m的整体式路基示范研究。研究结果表明:5种路基结构都能满足高速公路大尺度路基的调控要求,在示范过程中对其工程可行性进行了论证,提出了每种新结构的施工关键技术和控制指标,显著提升了施工效率和质量,通过2年的通车运营,示范工程全段整体技术状况良好,5种新结构目前已在青藏高速公路勘察设计中应用。
In order to research the roadbed control structure suitable for expressways in permafrost regions, four new types of roadbed structures as block stone-ventilated plate composite roadbed, forced dispersion ventilated roadbed, ventilated pipe roadbed, single heat-conducting pavement-block stone roadbed, are studied by a 12.25 m-wide demonstration study onGonghe-Yushu Expressway. And a demonstration study of thewhole embankment with a width of 24.5 m is carried outonHuashixia-Dawu Expressway.The results show that all the five kinds of subgrade structures can meet the regulation requirements of large-scale subgrade of expressway.In the demonstration, the application feasibilities are discussed, and key construction technologies and controlling index are presented for each new subgrade structure, promoting the construction efficiency and quality remarkably.After 2 year's operation, the demonstration segment showed a favorable technical situation. All the 5 new subgrade structures have been applying to the investigation and design of the Qinghai-Tibet Expressway.
In order to research the roadbed control structure suitable for expressways in permafrost regions, four new types of roadbed structures as block stone-ventilated plate composite roadbed, forced dispersion ventilated roadbed, ventilated pipe roadbed, single heat-conducting pavement-block stone roadbed, are studied by a 12.25 m-wide demonstration study onGonghe-Yushu Expressway. And a demonstration study of thewhole embankment with a width of 24.5 m is carried outonHuashixia-Dawu Expressway.The results show that all the five kinds of subgrade structures can meet the regulation requirements of large-scale subgrade of expressway.In the demonstration, the application feasibilities are discussed, and key construction technologies and controlling index are presented for each new subgrade structure, promoting the construction efficiency and quality remarkably.After 2 year's operation, the demonstration segment showed a favorable technical situation. All the 5 new subgrade structures have been applying to the investigation and design of the Qinghai-Tibet Expressway.
引文
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[11] 吴青柏,赵世运,马巍,等.青藏铁路块石路基结构的冷却效果监测分析[J].岩土工程学报,2005,27(12):1386-1390.
[12] 刘戈,汪双杰,穆柯,等.多年冻土区分离式路基热干扰预防及处治措施研究[J].公路交通科技,2015,32(10):43-49.
[2] 汪双杰.高原多年冻土区公路路基稳定及预测技术研究[D].南京:东南大学,2005.
[3] 汪双杰,黄晓明,陈建兵,等.无动力热棒冷却冻土路基研究[J].公路交通科技,2005,22(3):1-4.
[4] 汪双杰,陈建兵,李仙虎.多年冻土地区公路修筑技术研究与工程实践[J].冰川冻土,2009,31(2):384-392.
[5] DONG Yuanhong,LAI Yuanming,XU Xiangtian,et al.Using perforated ventilation ducts to enhance the cooling effect of crushed-rock interlayer on embankments in permafrost regions[J].Cold Regions Science and Technology,2010,62(1):76-82.
[6] 刘戈,樊凯,朱东鹏,等.多年冻土区路基调控措施的设计方法及适用性[J].公路交通科技,2008,25(9):279-290.
[7] 刘戈,汪双杰,袁堃,等.尺度效应下冻土路基结构适应性及优化[J].中国公路学报,2015,28(12):17-25.
[8] 董元宏,赖远明,陈武.多年冻土区宽幅公路路基降温效果研究——一种L型热管-块碎石护坡复合路基[J].岩土工程学报,2012,34(6):1044-1049.
[9] MA Wei,WEN Zhi,SHENG Yu,et al.Remedying embankment thaw settlement in a warm permafrost region with thermosyphons and crushed rock revetment[J].Canadian Geotechnical Journal,2012,49(3):635-644.
[10] 温智,盛煜,马巍,等.抛石护坡保护公路下退化性多年冻土效果现场监测研究[J].公路交通科技,2009,26(11):26-30.
[11] 吴青柏,赵世运,马巍,等.青藏铁路块石路基结构的冷却效果监测分析[J].岩土工程学报,2005,27(12):1386-1390.
[12] 刘戈,汪双杰,穆柯,等.多年冻土区分离式路基热干扰预防及处治措施研究[J].公路交通科技,2015,32(10):43-49.